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THOMAS S. DISSTON. OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO HENRYDISSTON, OF THE SAME PLACE.

Letters Patent No. 73,516, dated January 21,1868.

IMPROVEMENT IN GROSS-GUT SAWS.

.TO ALL.WHOM IT MAY CONCERN:

Be it known that I, THOMAS S. DIsSTON, of Philadelphia, Pennsylvania,have invented :1. Device for Securing Handles to Cross-Cut Saws; and Ido hereby declare the following to be a full, clear, and exactdescription of the same.

My invention consists of a device, fully described hereafter,wherebyithe handles can bereadily secured to, and as readily detachedfrom the blades of cross-cut saws. I

In order to enable others skilledin the art to make and apply myinvention, I will now proceed to describe its construction andoperation, reference beinghad to the accdmpanying drawing, which forms apart of this I specification, and in whieh-- Figures 1 and 2 aresections of the handle and part of the blade of across-cut saw with myimprovement.

Figure 3, the same, showingtheblade detached from the handle.

Figure 4, a vertical section on the line 1 2, fig. 2; and

Figure 5, a view of the end of the blade and bolt-head.

Similar letters refer to similar parts throughout the several views. I

A represents part of the blade of a cross-cut saw, and B one of'thehandles, at the lower end of which is cut a vertical slot, at, for thereception of the blade, the end of the latter havingtwo notches, adaptedto set-screws b b, which penetrate the handle, as shown in fig. 4. Inthe blade, near the end 'of the'same, is out a horizontal .opening, d,meeting and communicating with a vertical opening, e, the latterreceiving the headf, and the former the stem of a bolt, D, the outer endof which is provided with a thumb-nut, h, bearing against a washer, 2',adapted to the handle B. p

The head, f, of the bolt D hastwo slots, mm, as wide as or somewhatwider than the saw is thick, so that, in pushing the handle towards theblade, or the blade towards'the handle, (fig. 3,) the head of the boltat once finds its way to the opening, e, of the blade, the stein of thebolt fitting in the opening 01, and the screws 1) 6 into the notches inthe end of the blade.

'lhe bolt is now turned one-quarter round, or until grooves 11, n,formed in the inner face of the head, coincide with the shoulders q 1formed in the blade at the junctionot' the two openings, cl and e. Thenut in is now tightened, and the handle thereby effectually secured tothe blade. I

\Vhen the handle has to be detached, all that is necessary is to loosenthe nut to the limited extent required for withdrawing the grooves, 12n,'of the'head of the bolt from the shoulders, q q, of the blade, andthen turn the bolt until the slots, mm, of the head coincide with thesaid shoulders, after which the blade can be drawn away from the handle,as shown in fig. 3.

The grooves n n, in the heathf, of the bolt, are not indispensable,although I prefer them as a means of preventing the bolt from beingturned after the handle has been secured to the blade.

I do not claim broadly securing a handle to a saw-blade by bolts passingthrough the handle and into openings in the blade, frontwhich openingsthe bolts may be withdrawn without disconnecting them from the handle;but

I claim as my invention, and desire to secure by Letters Patent A bolt,D, with a. slotted head,f, in combination nith a handle, B, slotted forthe reception of one end of a saw-blade, and having screws 6, or otherequivalent bearings, for the end of the said blade, when the latter hasopenings (2 e, adapted for thereception of the head and end of the bolt,all substantially as described.

In testimony whereofll hdve signed my name to this specification in thepresence of two subscribing witnesses.

Tl-IOS. S. DISSTON.

Witnesses:

Jon): WnrTE, W. J. R. DEL A'r.

